[Info-vax] Telnet problems

[Dave]

On Feb 17, 8:04 am, Steven Schweda <sms.antin... at gmail.com> wrote:
> Bob Gezelter wrote:
> > Some important discriminators:
> > - if the machine is identified by numeric IP address from a different
> > system, is the delay still there
>
>    If the problem is a failing _reverse_ DNS look-up of the
> client by the _server_, then it probably won't matter how the
> _client_ identifies the server.
>
>    This suggestion is frequently made, but seldom helps.  It's
> rare for there to be a big delay in the original DNS look-up
> of the server by the client (which finally succeeds), but
> that's what is tested by doing "telnet ip.address" instead of
> "telnet "name".

Another cause for this kind of delay is that there maybe more than one
DNS server defined, and the first is non-responsive.     The DNS
servers are often queried "round-robin" style, with a timeout involved
between each query.     If the first is unresponsive, the process must
wait until the timeout expires before the query is sent to the next,
etc., etc.

Just a thought.

Dave.